Description_x000D_ Packaging_x000D_ 10, 25, 100, 500 mL in glass bottle_x000D_ Biochem/physiol Actions_x000D_ N,N-Dimethyl-1-naphthylamine (1-Dimethylaminonaphthalene) is used to study nitrate reduction by organisms. Reduction of nitrate results in the formation of nitrite, which reacts with sulfanilic acid and 1-dimethylaminonaphthalene to form a red diazo dye.